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Fertilizers are important part of crop production without which it is impossible to meet the demand of ever-growing population. Fertilizers provide macro and micronutrient to plant which are inadequate in soil. But the continuous use of synthetic fertilizers renders soil and environment unhealthy. Fertilizers provide important nutrient to plants but imbalance use of fertilizers make the soil unhealthy. Bio-fertilizers emerged out to be one of the answers of above problems as it provide nutrient to plants without deteriorating soil health. Bio-fertilizers are low cost renewable source of nutrients, which are used as supplements to chemical fertilizers.

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bio fertilizer.pdf